```html
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js" type="text/javascript"></script>
</head>

<body>
  <div id="app">
    {{ message }}
  </div>

  <script>
    let vm = new Vue({
      el: '#app',
      data() {
        return {
          message: 'Hello Vue!'
        }
      }
    })

  </script>
</body>

</html>
```
